Plz given quadrilateral abcd, if diagonals ac and bd bisect each other, and angle abc=91°, but you know nothing about any lengths in the diagram, what special figure must abcd be? a rhombus or a parallelogram? how do you know.

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank